Change-speed gear.



F. O. BYNOEi CHANGE SPEED GEAR} APPLICATION FILED AUG-B. 1916- PatentedJ 1113731, 1917..

5 SHEETSSHEET I F. 0. BYNOE.

CHANGE SPEED GEAR. APPLICATION man VAUG-B, ISHG.

Patented July 31, 1917.

5 SHEETSSHEET 2 1 a m n Y7 mv v U7 5 F FJO. BYNOE.

CHANGE SPEED GEAR.

APPLICATION FILED Aue.a. 1916.

Patented July 31, 1917.

5 SHEETS-SHEET 3.

' F. 0 BYNOE.

CHANGE SPEED GEAR.

APPLICATION FI LED AUG.8, 1916.

Patented July '31, 1917.

5 SHEETS-SHEET 4.

F. 0. BYNOE.

CHANGE SPEED GEAR.

APPLICATION FILED'AUG.8. 2916.

.1 234,868. Pafented uly 31, 1917. i

k V/ F I I a WM FREDERICK OATLEY BYNOE, OF ACTON, ENGLAND.

CHANGE-SPEED GEAR.

Specification of Letters fatent.

Patented July 31, 1917.

Application filed August 8, 1916. Serial N 0. 113,820.

To all whom it may concern:

Be it known that I, FREDERICK OATLEY BYNOE, a subject of the King ofGreat Britain and Ireland, and resident of Acton, county of Middlesex,England, have invented a certain new and useful Improvement inChange-Speed Gear, of which the following is a specification.

This invention relates to improvements in frictional change speed gear.

The invention is illustrated by the accompanying sheets of drawings, inwhich Figure 1 is an elevation and Fig. 2 a sectional view on line 1, 1of the outside case containing the mechanism hereinafter referred to.

Fig. 3 is a longitudinal section, gear being shown at low speed.

Fig. 4 is a view of a cylindrical frame detached and showing the conescarried thereby.

Fig. 5 is a transverse section on line 2, 2 of Fig. 3.

Fig. 6 is a transverse section on line 3, 3 of Fig. 3.

Figs. 7, 8 and 9 are views showing how the roller hereinafter referredto may be provided or fitted with a spring contact ring, Fig. 7 being aside view of the spring contact ring, Fig. 8 an end View of the rollershowing rin in position, and Fig. 9 is a detail elevation thereof.

Figs. 10 and 11 are views showing the roller provided with corrugatedcontact rings.

Fig. 12 is a view similar to Fig. 3, but

showing the pressure removed from the cone-carrying frame and rollerfree to be shifted.

Fig. 13 is a view similar to Fig. 12, but showing roller shifted forhigh speed and pressure on cone-carrying frame restored.

Fig. 14: shows the construction of the double cones.

Fig. 15 shows a modified construction of said double cones.

Fig. 16 is a part longitudinal sectional view showing a modification ofthe arrangement shown in Figs. 3 to 13.

Fig. 17 is a view showing the conical frame employed in such modifiedarrangement, and cones carriedby said frame.

18 is a sect onal. view o line 4:, 4

. are- Fig. 19 is a sectional view on line'5, 5 of Fig. 7

Figs. 20 and 21 are diagrammatic views hereinafter referred to.

Like letters of reference indicate corresponding parts in the severalfigures.

speed gear consists essentially of a series of double cones designatedby a as a whole, and

hereinafter more particularly described,

loosely mounted in longitudinal slots 6 spaced at equal distances apartaround the circumference of a frame 0 centrally and rotatably mountedwithin an outer stationary case 63 provided with a conical bore whichforms a cone race 6, said frame c as shown in Figs. 3, 4L, 5, 6, 12 and13 being of cylindrical formation, so that when said frame is rotated byits shaft f the cones run around the conical race 6, provision, ashereinafter described, being made, in the frame 0 for a radialadjustment of the distance between said cones and the central axisaround which they revolve.

Mounted on the shaft 9, which in the present case is the driven shaft,and fitting centrally within the cylindrical cone-carrying frame 0, isthe roller 72, which contacts with the cones a; in such a manner thatthe cones a which surround it press against its circumference as theyroll around the conical race 6 and cause it to revolve. This roller hmayasshown in Figs. 3, 12, 13

' In carrying out the invention, the change and 16be plain, or saidroller h-as shown in Figs. 7, 8 and 9may be recessed at h for thereception of a ring it? having an internal diameter slightly in excessof the recessed portion k, and an external diameter slightly in excessof the external diameter of the roller to allow of its constantdeformation during rotation when in contact with the cones a,projections h on said ring fitting in notches h in the roller preventingsaid. ring rotating on said roller.

cones, and for this purpose the shaft 9 is arranged to have a sliding aswell as a rotary motion.

A spring acting on the cylindrical conecarrying frame is arranged insuch a manner that it pushes the cones into the conical bore or race ofthe outer case, so that said cones act as revolving wedges between saidconical race and the roller, the amount of pressure, being dependent onthe strength of the spring, being varied as required.

Such an arrangement may consist-as shown in Figs. 3, 12 and 13of a coilspring j surrounding the driving shaft f of the frame 0, said spring 7'taking between a collar j butting against the rear end 0 of the frame 0and a screwed collar y' said collar j being screwed more or less intothe outer case d.

A suitable arrangement of removing or relieving the pressure of thespring is provided to facilitate the skidding of the roller 72, to anyposition along the cones and which at the same time acts as a clutchrelease as it sets the roller free.

Such an arrangement consistsas shown in Figs. 1, 2, 3, 12 and 13-of acompound lever, one arm is of which is pivoted at 76 to the outer case dand connected by links is, pivoted at 76 to a collar 7% loosely butnonslidably mounted on the shaft 9 and pivoted at k to said arm is, and,on being operated by a downward movement, slides the shaft 9 and with itthe roller h to any position between the smaller and larger ends of thecones. The other arm k of the compound lever is pivoted in its length atis to the arm 70 and bears by its inner end 7:" on the front end 0 ofthe cone-carrying frame 0 so that as said arm k is actuated, (upwardmovement) it presses back said cone-carrying frame 0 against the actionof the spring 7, thus releasing the pressure of said spring upon thecones, setting the roller free. This operation facilitates the slidingof the roller to a new position and acts as a clutch release.

The arms 70, 7& of the compound lever act in unison, that is to say, ifit be required to shift the roller h from the position shown in Fig. 3to the position shown in Fig. 13,

then the outer ends of said arms 70, 7c are brought together as in Fig.12 and then depressed together; or if the shaft j be required to runfree, then by locking the arm h when it has pressed back the cone-carrying frame 0, no motion is transmitted from said cone-carrying frame 6 tothe centrally disposed rotatable shaft g, as there is no frictionalcontact between the cones a and the roller 7a and the cone race 6.

For the proper working of the invention it is necessary that the ratiobetween the diameters of the conical race e and the diameters of thecones at every section of contact between them shall be the same.

sary that double cones constructed in the 7 following manner andillustrated more especially in Figs. 14: and 15 must be used.

Each double cone consists of three sections, viz :a cone (4 between thetwo end sections a a of another cone, the sides of the middle coneconverging at a more obtuse angle than, and to a point in thelongitudinal axis of the cone of which the end sections a", a only areretained.

By this construction the sides of the mid dle cone a, or middle cone,maybe made parallel with the axis of the conical race 6- see Figs. 3, 12and 13and exert a pressure upon the whole length of the roller, whilethe two end sections a, a which form parts of the other cone are incontact with the conical race esee Figs. 3 and 13. Thus, while the sameratio between the diameters of the two end sections a a of the cones andthe diameter of the conical race a at their point of contact ismaintained, the parallelism be tween the sides of the middle parts a ofthe cones which face the axis of the conical race 0 insures good contactwith the roller h, and it also provides a parallel path whichfacilitates the sliding of the roller as it is moved along to a newposition between the cones when changing speed.

When the cone-carrying frame 0 is rotated, the cones a as a wholerevolve around the conical race :2 and the roller h is revolved withvarying speeds according to the variations in the diameter of thesections of the middle cones 0: which are acting upon said roller, thelimit of the variations of speed 7 which can be obtained being dependenton the difference in diameter between the larger and smaller ends of thecones a.

In the modified form of arrangement of change speed gear shown in Figs.16, 17, 18 and 19, a conical cone-carrying frame 0 is employed and suchframe 0 is at its front and rear ends 0*, c slot-ted for the receptionof slides c in which are housed the pins a of the double cones a, suchslides 0 allowing for the rise and fall of the cone, and for the moreperfect working of the cone-carrying frame 0 there is interposed betweenthe end 0 of the frame and the loose collar on the shaft 7 aball-bearing ring 7' the pressure of the spring 7' on said ball-bearingring 7' and the frame a being regulated by means of the screwed collaror cap 7' As shown diagrammatically in Fig. 20, a second central rollerh may be employed to actuate the cones, the shafts of the rollers beingconnected up in any suitable manner so that .the rollers h, k" may bemoved toward or away from one another; oras shown in Fig. 2l-gear wheelsa may be attached to the ends a of the cones a and meshed to a centraldriving gear a.

The roller spindle may be fixed, then either the outer casing containingthe cone race or the cone carrier may be the driver, the other beingdriven. In like manner, the cone carrier may be made stationary, theneither roller or outer casing may be driver or driven. If the outercasing is made stationary as illustrated and described herein, eitherthe carrier or roller may be driver or driven. In the case of twocentral rollers being used, either may be driver and the other driven. I

Having now described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is 1. A frictional changespeed gear including in combination a driving element and a drivenelement a casing having a cone race, double cones operated by thedriving element and consisting of three sections, namely, a

cone between two end sections of another cone, the sides of the middlecone converging at a more obtuse angle than the sides of the end cones,and the sides of said end cones being disposed at an angle to the axisof the cone race of the casing, while the sides of the middle cones areparallel with said axis.

2. A frictional change speed gear includ: ing in combination a drivingelement and a driven element a casing forming a bearing for the drivingelement and having a cone race, double cones operated by the drivingelement and consisting of three sections, namely, a cone between two endsections of another cone, the sides of the middle cone converging at amore obtuse angle than the sides of the end cones, and the sides of saidend cones being disposed at an angle to the axis of the cone race of thecasing, while the sides of the middle cones are parallel with said axis,and an axially shiftable roller carried by the driven element andengaging with the middle parallel portions of said double cones housedwithin the casing.

3. A frictional change speed gear including in combination a drivingelement and a driven element a casing having a cone race, double conesoperated by the driving element consisting of three sections, namely, acone between two end sections of another cone, the sides of the middlecone converging at a more obtuse angle than the sides of the end cones,and the sides of said end cones being disposed at an angle to the axisof the cone race of the casing, while the sides of the middle cones areparallel with said axis, and maintain the same ratio between thediameters of the two end sections of the double cones and the diameterof the cone race at their points of contact, and an axially shiftableroller carried by the driven ele ment for engaging with the parallelsides .ofthe middle sections of the double cone.

4. A friction change speed gear including in combination a drivingelement and a driven element, a casing having a conical pressure of thespring.

7 5. A frictional change speed gear, including in combination adriving'element and a driven element a casing having a conical boreforming a cone race, a cone carrying frame having longitudinal slots,double cones loosely mounted in said slots of the frame, said doublecones having-their end sectionsengaging the conical race, a rollercarried by the driven element and centrally mounted between andshiftable along said double cones, a spring bearing on said conecarryingframe to push the same into the conical bore so that the cones act asrevolving wedges between the conical race and the roller, means forregulating the pressure of the spring, and means for relieving the pres.

sure of said spring to facilitate the sliding of the roller and act as aclutch release.

6. A frictional change speed gear, including a driving shaft a casingforming a bearing for said driving shaft having a conical bore forming acone race, a cone carrying frame having longitudinal slots, double conesloosely mounted in said slots, said double cones having their endsections engaging the conical race, a driven shaft, a loose collar onsaid shaft, a roller also on said shaft and mounted between andshiftable along the middle section of said double cones, a springbearing on said cone-carrying frame to push the same into the conicalbore so that the cones act as revolving wedges between the conical raceand the roller, means for regulating the pressure of the spring, meansfor relieving the pressure of said spring to facilitate the sliding ofthe roller and act as a clutch release, a compound lever one arm ofwhich is pivoted to the outer case and linked up to said loose collar onthe roller shaft, while the other arm of the compound lever is pivotedin its length to the other arm of the compound arms acting in unison. V

7.- A frictional cha g peed gear, including a casing having a conicalbore forming a cone race, a cone carrying frame having longitudinalslots, double cones loosely mounted in said longitudinal slots, gearsattached to .either end of said double cones and meshing with a centraldriving gear, said double cones having their end sections engaging theconical race, a roller centrally mounted between and shiftable alongsaid cones, a spring bearing on said cone-carrying frame to push thesame into the conical bore so that the cones act as revolving wedgesbetween the conical race and the roller, and means for regulating thepressure of the spring.

8. A frictional change speed gear, including a driving and driven shafta casing forming a bearing for said driving shaft and having a conerace, double cones consisting of three sections, viz.a cone'between twoend sections of another cone, the sides of the middle cone converging ata more ohtuse angle than the end sections, said cones being mountedwithin said cone race Where- Copies of this patent may be obtained forrace at an angle to the axis thereof, an

the end parts revolve in contact with the axially shiftable rollercarried by the driven shaft and engaging the middle cones of thecompound cones for transmitting power,

ment of a plurality of compound cones operated by said driving element,said cones being mounted about a horizontal axis, and each having theirown axis converging toward said horizontal axis, each of said conescomprising bearing end portions, and an intermediate working portion,the faces of said intermediate working portions being parallel. V

In testimony whereof I have aflixed my signature in presence of twowitnesses.

FREDERICK OATLEY BYNOE. Witnessesz,

ROBERT HUNTER, BENJM. Tnos. KING.

five cents each, by addressing the Gommissioner of Patents,

Washington, I), C.

